INFO APRIL 2015
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W W W E VISIT FOR M .NGU.NO O RE I N FO
PETROPHYSICAL DATA The Geological Survey of Norway (NGU) has established a petrophysical database, which contains measurements of density, magnetic susceptibility and natural remanent magnetization of rock specimens from the main lithologies in selected areas.The rock samples have been collected by NGU and academic institutions since the 1930’s, and the measurements were carried out at the petrophysical and palaeomagnetic laboratory at the NGU during the last 30 years. The database contains data for a total of 47,070 measurements. Some of the sampling programmes have been concentrated in coastal areas, and p articular attention has been paid to regions where the potential field data show
that basement structures continue from land into the continental shelf. Statistical parameters have been calculated for regionally extensive lithologies and rock groups (basement complexes, individual nappes, greenstone belts, intrusions, mafic complexes). Rock units with only local significance have been excluded from the data-set (sulphide mineralisation, hydrothermal alteration zones). Reports on the petrophysical data from Finnmark and Central Norway can be purchased from NGU. Part of the offshore study is carried out as a collaboration project with SINTEF (Origin of Sediment-Related AeroMagnetics - OSRAM). The location map shows all the sample points in the database.
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